What is the singular version of criteria, and why is it irregular? A.
Criterion is the singular version, and it is irregular because it is a Greek word in which the –on is changed to –a in its plural form.
B.
Criteris is the singular version, and it is irregular because it is a Greek word in which the –is is changed to –a in its plural form.
C.
Criterium is the singular version, and it is irregular because it is a Greek word in which the –um is changed to –a in its plural form.
D.
Criterion is the singular version, and it is irregular because it is a Latin word in which the –on is changed to –a in its plural form.